[alsa-devel] [PATCH] hda: Add logic to force HP mixer creation

[Matthew Ranostay]

Mario Limonciello wrote:
> Hi Takashi:
> 
> Takashi Iwai wrote:
>> If "Surround" doesn't do anything, why should it be there?
>> And, does "Headphone" change both headphones even with 4 or 6 ch outputs
>> properly?   Doesn't "Headhpone" change any other output volumes?
>>   
> I found what the surround mixer is being used for. If "Mic as Output" is
> turned on, "Surround" acts as the mixer to control that jack.
> 
Correct. 

The the reason the headphone mixer isn't created without my patch is the "mic as output"
and "line in as output" switches.

> The Headphone mixer changes both of the regular headphone jack's
> volumes. Changing the "Headphone" volume doesn't affect the speaker
> outputs at all, only the two headphone jacks.
>> The patch introduces another exception, and now nobody would understand
>> how the channels and outputs and mixers are assigned together.
>>   
> Two points:
> 1) I'm not sure this is as much of a problem as you raise. I don't
> believe many people even know how the channels and mixers are assigned
> in the first place. I see plenty of support requests for "why doesn't
> this second headphone jack work with headphones". I've never seen one of
> "I can't hook up my 7.1 surround system to my consumer grade laptop and
> have all of my speakers work". These machines come with DisplayPort and
> HDMI ports which people will generally be using for hooking up to their
> television sets. I seem to think it's not very common to use the
> analogue jacks to independently hook up pairs of speakers assigned to
> say Front or Surround.
> 2) You are still able to hook up a separate set of speakers to the mic
> output jack and since those are assigned surround have things work as
> expected.
> 
>> Hm, I thought I did.  Which patch exactly?
>>
>>   
> The patch title was [PATCH] hda: Add STA_DELL_S14 quirk. Here's the
> starting part of it:
> 
> Add STAC_DELL_S14 quirk for new laptop series. Removed un-needed pins in pin_nids
> for stac92hd83xxx. Also reorganized connection selection code for the respective ports
> per quirk define.
> 
> ---
>  sound/pci/hda/patch_sigmatel.c <imap://mario_limonciello@outlook.dell.com:143/fetch%3EUID%3E/INBOX%3E13699#sound/pci/hda/patch_sigmatel.c> |   52 +++++++++++++++++++++++++++-------------
> 
> 
>  1 files changed, 35 insertions(+), 17 deletions(-)
> 
> 
> You responded to the mail saying it was applied, but I seem to not be
> able to find it in current ALSA git.
> 
> Regards